Your items can be displayed in two ways. You can use the searchable list of all products, or you can arrange them as buttons grid for quick access.
Alternating between the grid and the list is achieved by a single tap:
If the products are listed, tap on the grid icon at the bottom of the screen to access the grid.
If the products are displayed in the grid, tap on the products list icon (≡) at the bottom of the screen to switch to products list view.